The above formula has been indirectly confirmed by measuring the decay of the orbital period with time of the binary pulsar PSR 1913+16 [1]}, [2]}, [3]}. In the case of a black hole-white dwarf binary system one has
\(Q_{\alpha \,\beta }^m &=& \int (3\, r_\alpha r_\beta - r^2 \delta _{\alpha \,\beta })\,\Big ( m_B n_B ({\bf {r}}) + m_F n_F ({\bf {r}}) \Big ) \, d^3 r \nonumber \\&=& m_B N_B\, \bar{Q}_{\alpha \,\beta }^m \,,\) 
